我真的无法进入测试世界。我正在尝试编写一些简单的测试来开始。这是我的测试:
describe('UsersController', () => {
let usersController: UsersController;
let usersService: UsersService;
let module = null;
let connection: Connection;
beforeEach(async () => {
module = await Test.createTestingModule({
modules: [DatabaseModule, LibrariesModule],
controllers: [UsersController],
components: [UsersService, ...usersProviders],
})
// TODO: provide testing config here instead of separate .env.test file
// .overrideComponent(constants.config)
// .useValue()
.compile();
connection = module.select(DatabaseModule).get(constants.DBConnectionToken);
usersService = module.get(UsersService);
usersController = module.get(UsersController);
});
afterEach(async () => {
jest.resetAllMocks();
});
describe('getAllUsers', () => {
it('should return an array of users', async () => {
const result = [];
expect(await usersController.getAllUsers())
.toEqual([]);
});
});
describe('createUser', () => {
it('should create a user with valid credentials', async () => {
const newUser: CreateUserDto = {
email: 'mail@userland.com',
password: 'password',
name: 'sample user',
};
const newUserId = '123';
jest.spyOn(usersService, 'createUser').mockImplementation(async () => ({user_id: newUserId}));
const res = await usersController.createUser(newUser);
expect(res)
.toEqual( {
user_id: newUserId,
});
});
});
});
当我尝试创建新的测试模块时问题就开始了(每次测试之前都会发生),typeorm抱怨仍然活跃的数据库连接(在第一次测试之后):
Cannot create a new connection named "default", because connection with such name already exist and it now has an active connection session.
顺便说一句,我如何在每次测试后从数据库中删除所有记录?